Results 51 to 60 of about 3,735 (200)

Condition Assessment of High Voltage Power Transformer Using Dissolved Gas Analysis [PDF]

, 2013
Condition monitoring is the process, which is used to monitor parameter of condition in machinery, such that if a significant change occurs it indicates that it may lead to failure of that machine.
Boda, Sonal Sagar, Patra, Debashis Ranjan   +1 more
core  

Dissolved Gas Generation Characteristics of Dielectric Liquids Under Partial Discharges and Breakdown Sparks

High Voltage, EarlyView.
ABSTRACT With the growing interest in monitoring and diagnostic techniques for assessing transformer condition, dissolved gas analysis (DGA) stands out as a crucial diagnostic tool to detect electrical and thermal faults in liquid‐immersed transformers.
Gechen Bian, Qiang Liu, Paul Jarman, Pascal Mavrommatis   +3 more
wiley   +1 more source

A Methodology for the Calculation of Typical Gas Concentration Values and Sampling Intervals in the Power Transformers of a Distribution System Operator

Energies, 2020
Predictive maintenance strategies in power transformers aim to assess the risk through the calculation and monitoring of the health index of the power transformers.
Sergio Bustamante, Mario Manana, Alberto Arroyo, Raquel Martinez, Alberto Laso   +4 more
doaj   +1 more source

Dynamic Bayesian Network for Continuous Health Index Estimation and Condition Assessment of Power Transformers

High Voltage, EarlyView.
ABSTRACT To address the limitations of traditional transformer health index (HI), such as high dependence on data integrity and inability to assist in diagnosing latent faults, this study proposes an HI prediction method based on dynamic Bayesian network (DBN).
Shuaibing Li, Hongyu Li, Yi Cui, Yongqiang Kang   +3 more
wiley   +1 more source

Sistem Deteksi pada Transformator Menggunakan Dissolved Gas Analysis (DGA) Dengan Metode Logistic Regression

AITI
Penelitian ini membahas implementasi sistem deteksi kegagalan pada transformator dengan analisis gas terlarut Dissolved Gas Analysis (DGA) dengan menerapkan metode Logistic Regression. Metode Logistic Regression dipilih sebagai alat klasifikasi untuk mengidentifikasi pola gas yang dapat mengindikasikan kondisi kritis pada transformator.
Kurniawan Indra Wibowo, Hendry Hendry
openaire   +3 more sources

Determination of transformer performance index based on dissolved gas analysis [PDF]

, 2010
Dissolved Gas Analysis (DGA) is the single most widely used and most effective test to determine transformer’s operation conditions. The detection of gases generated in the transformer is the first available indication of the transformer malfunction ...
Md. Zain, Zainol Alam
core  

Gas and optical sensing technology for the field assessment of transformer oil [PDF]

, 2010
Oil testing has found widespread use in assessing the quality of the insulation system of a transformer. Techniques such as Dissolved Gas Analysis (DGA) have been proven to be reliable in this task, but are expensive, laborious and time consuming.
Abeyratne, Udantha, Amrulloh, Yusuf, Ekanayake, Chandima   +2 more
core   +1 more source

Evaluation Methodology, Numerical Verification and Retrofilling Procedure for Power Transformers to Ensure K‐Class Flame Retardancy and Environmentally Friendly

High Voltage, EarlyView.
ABSTRACT With increasing demands for fire safety and environmental friendliness, retrofilling transformers with alternative insulating liquids has become a growing trend. However, retrofilling power transformers remains uncertain, as more residual mineral oil compromises K‐class flame retardancy, and its impact on environmental performance has yet to ...
Zhenfu Tang, Yihua Qian, Dan Zhou, Wei Hu, Feipeng Wang, Yang Xu   +5 more
wiley   +1 more source

A Transformer Fault Diagnosis Model Using an Optimal Hybrid Dissolved Gas Analysis Features Subset with Improved Social Group Optimization-Support Vector Machine Classifier

Energies, 2018
Dissolved gas analysis (DGA) is widely used to detect the incipient fault of power transformers. However, the accuracy is greatly limited by selection of DGA features and performance of fault diagnostic model.
Jiake Fang, Hanbo Zheng, Jiefeng Liu, Junhui Zhao, Yiyi Zhang, Ke Wang   +5 more
doaj   +1 more source

Strategic Design of Oxophilic Dopants for Active and Durable Alkaline Hydrogen Evolution Reaction Under Seawater

Advanced Functional Materials, Volume 36, Issue 3, 8 January 2026.
This study explores a cost‐effective alternative by incorporating oxophilic dopants into non‐precious metal hosts to enhance water dissociation and catalyst stability. Computational screening identified Ni─V, Ni─Mo, and Co─V as top candidates. Subsequent experiments confirmed Ni20V exhibits superior HER activity, achieving 76 mV lower overpotential ...
Hyeonjung Jung, Yechan Lee, Kyuri Cho, Tae Yong Kim, Jihyeon Song, Han Sol Jung, Sung Il Park, Yoojin Lee, Jinuk Moon, Wongyu Park, Jaewoo Nam, Sangmin Park, Wooyul Kim, Jeong Woo Han   +13 more
wiley   +1 more source